X-type outrigger frame, control method and mobile lifting work platform

Abstract

The application discloses an X-shaped outrigger frame, a control method and a mobile lifting work platform, and belongs to the technical field of mobile lifting work platforms. The mobile lifting work platform comprises a frame structure, an integrated swing outrigger and a split-type outrigger. One side of the frame structure is connected with the integrated swing outrigger through a pin shaft, and the other side of the frame structure is connected with the split-type outrigger through a pin shaft. The split-type outrigger comprises a front end floating outrigger and a rear end swing outrigger. The front end floating outrigger and the rear end swing outrigger are hinged below. A floating outrigger oil cylinder is arranged between the front end floating outrigger and the rear end swing outrigger. One end of the floating outrigger oil cylinder is hinged with the front end floating outrigger, and the other end is hinged with the rear end swing outrigger. The split-type outrigger changes the limitation that the outrigger can only realize horizontal swing and cannot realize vertical movement in the prior art, so that the X-shaped outrigger frame structure can better adapt to respective road conditions in the driving process.

Description

Technical Field

[0001] This invention belongs to the technical field of mobile lifting work platforms, specifically relating to an X-shaped outrigger frame, a control method, and a mobile lifting work platform. Background Technology

[0002] Currently, mobile lifting work platforms with a working height of 40 meters or more generally adopt an X-type swing-leg frame. The four outriggers are connected to pins located at the four corners of the frame body, allowing them to swing within a certain range, thus achieving the functions of retracting and expanding the outriggers. During transportation or travel, the mobile lifting platform can use the frame with the expanding outriggers to retract the outriggers, reducing the overall width of the vehicle to meet the size restrictions of road transport or travel. During operation, the expanding outriggers can be used to extend the outriggers, increasing the span and providing better operational stability when working at higher positions. However, due to its structural limitations, the existing X-type swing-leg frames of mobile lifting work platforms can only swing horizontally, unable to move vertically. During travel or operation, when there is a significant difference in the ground contact between the left and right wheels, the wheel on the lower side is prone to being suspended or slipping, resulting in "three-point support" or "two-point support" situations, affecting the overall machine's passability and operational stability. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an X-type outrigger frame, a control method, and a mobile lifting work platform to solve the problem that when the difference in the contact height between the left and right wheels with the ground is large during the walking or operation of the existing X-type outrigger frame, the wheel on the lower side of the ground is easily suspended or slips, making it impossible to achieve axle balance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an X-type outrigger frame, comprising: a frame structure, an integrated swing outrigger, and a split outrigger. The integrated swing outrigger is connected to one side of the frame structure via a pin, and the split outrigger is connected to the other side of the frame structure via a pin. The split outrigger includes a front floating outrigger and a rear swing outrigger. The front floating outrigger and the rear swing outrigger are hinged together at their lower ends. A floating outrigger cylinder is provided between the front floating outrigger and the rear swing outrigger. One end of the floating outrigger cylinder is hinged to the front floating outrigger, and the other end is hinged to the rear swing outrigger.

[0005] Furthermore, the rear swing leg includes a first rear swing leg and a second rear swing leg, and the front floating leg includes a first front floating leg and a second front floating leg; the first rear swing leg and the first front floating leg are connected below by a first floating leg pin and a first floating leg cylinder is provided above the first floating leg pin, and the second rear swing leg and the second front floating leg are connected below by a second floating leg pin and a second floating leg cylinder is provided above the second floating leg pin.

[0006] Furthermore, the first floating outrigger cylinder includes a first rod chamber and a first rodless chamber, and the second floating outrigger cylinder includes a second rod chamber and a second rodless chamber. The first rod chamber and the second rod chamber are connected through a rod chamber hydraulic pipeline, and the first rodless chamber and the second rodless chamber are connected through a rodless chamber hydraulic pipeline. A switching valve is provided on both the rod chamber hydraulic pipeline and the rodless chamber hydraulic pipeline.

[0007] Furthermore, a swing leg cylinder is provided between the first rear swing leg and the second rear swing leg.

[0008] Furthermore, an integrated swing leg cylinder is provided between the integrated swing legs.

[0009] Furthermore, one end of the first floating outrigger cylinder is connected to the first front floating outrigger via a pin, and the other end is connected to the first rear swing outrigger via a pin; one end of the second floating outrigger cylinder is connected to the second front floating outrigger via a pin, and the other end is connected to the second rear swing outrigger via a pin.

[0010] In a second aspect, the present invention provides a control method for an X-type outrigger frame, using the X-type outrigger frame described in the first aspect above, comprising: During operation, the switch valve opens, unlocking both the first and second floating outrigger cylinders, allowing them to adjust freely according to road conditions. During operation, the switch valve is closed, and both the first and second floating outrigger cylinders are locked.

[0011] Thirdly, the present invention provides a mobile lifting work platform equipped with the X-shaped outrigger frame described in the first aspect.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting one side of the X-type outrigger frame as a split outrigger including a rear swing outrigger and a front floating outrigger, a floating outrigger cylinder is provided between the rear swing outrigger and the front floating outrigger. The rear swing outrigger and the front floating outrigger are respectively hinged to the two ends of the cylinder. When the cylinder extends and retracts, the front floating outrigger can float up and down relative to the rear swing outrigger. This changes the limitation of the existing technology where the outrigger can only swing in the horizontal direction and cannot move in the vertical direction, making the X-type outrigger frame better adapt to various road conditions during driving. 2. The rod-side and rodless-side hydraulic lines of the floating outrigger cylinders on both sides are connected and equipped with switching valves. During travel, the switching valves are open, allowing hydraulic oil to flow freely between the two cylinders, and the front floating outriggers self-level by following the undulations of the road surface. During operation, the switching valves are closed, locking the two floating outrigger cylinders and forming a rigid connection, so that the four outriggers provide stable four-point support for the entire machine. Connecting the hydraulic lines of the two floating outrigger cylinders reduces the complexity and cost of implementing the split-type outrigger linkage control scheme, and improves reliability and response speed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a mobile lifting work platform. Figure 2 This is a schematic diagram of the X-type outrigger frame structure of the present invention.

[0014] In the diagram, 1 is the frame structure, 2 is the integrated swing leg, 31 is the first rear swing leg, 32 is the second rear swing leg, 41 is the first front floating leg, 42 is the second front floating leg, 51 is the first floating leg cylinder, 52 is the second floating leg cylinder, 61 is the first floating leg pin, 62 is the second floating leg pin, 7 is the floating cylinder pin, 81 is the swing leg cylinder, 82 is the integrated swing leg cylinder, and 9 is the swing leg pin. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0016] Example 1

[0017] like Figure 1 and Figure 2As shown, this embodiment provides an X-type outrigger frame, including: a frame structure 1, two integral swing outriggers 2, and a split outrigger. Two integral swing outriggers 2 are connected to one side of the frame structure 1 by a pin, and a split outrigger is connected to the other side of the frame structure 1 by a pin. The split outrigger includes a front floating outrigger and a rear swing outrigger. The front floating outrigger and the rear swing outrigger are hinged at the bottom. A floating outrigger cylinder is provided between the front floating outrigger and the rear swing outrigger. One end of the floating outrigger cylinder is hinged to the front floating outrigger, and the other end is hinged to the rear swing outrigger.

[0018] like Figure 2 As shown, the two integrated swing legs 2 are connected to the frame structure 1 via swing leg pins 9.

[0019] The two integrated swing legs 2 are connected by an integrated swing leg cylinder 82. The extension and retraction movement of the integrated swing leg cylinder 82 can make the integrated swing leg 2 swing in the horizontal direction to realize the functions of expanding and retracting the bridge.

[0020] like Figure 2 As shown, the other two support legs are split support legs, including a rear swing support leg and a front floating support leg. The front floating support leg includes a first front floating support leg 41 and a second front floating support leg 42; the rear swing support leg includes a first rear swing support leg 31 and a second rear swing support leg 32.

[0021] The first rear swing leg 31 and the second rear swing leg 32 are both connected to the frame structure 1 via swing leg pins 9.

[0022] The first rear swing leg 31 and the second rear swing leg 32 are connected by a swing leg cylinder 81. The extension and retraction movement of the cylinder can make the rear swing leg swing horizontally, thereby realizing the functions of expanding and retracting the bridge.

[0023] like Figure 2 As shown, the first rear swing leg 31 and the first front floating leg 41 are connected by the first floating leg pin 61 at their lower ends, and a first floating leg cylinder 51 is arranged above the connection of the first floating leg pin 61. The two ends of the first floating leg cylinder 51 are connected to the first front floating leg 41 and the first rear swing leg 31 respectively by floating cylinder pins 7. The first floating leg cylinder 51 moves in extension and retraction, and the first front floating leg 41 can float up and down relative to the first rear swing leg 31.

[0024] like Figure 2As shown, the second rear swing leg 32 and the second front floating leg 42 are connected below by the second floating leg pin 62, and a second floating leg cylinder 52 is arranged above the connection of the second floating leg pin 62. The two ends of the second floating leg cylinder 52 are connected to the second front floating leg 42 and the second rear swing leg 32 respectively through floating cylinder pins 7. The second floating leg cylinder 52 moves in extension and retraction, and the second front floating leg 42 can float up and down relative to the second rear swing leg 32.

[0025] The first floating outrigger cylinder 51 includes a first rod chamber and a first rodless chamber, and the second floating outrigger cylinder 52 includes a second rod chamber and a second rodless chamber. The first rod chamber and the second rod chamber are connected by a rod chamber hydraulic pipeline, and the first rodless chamber and the second rodless chamber are connected by a rodless chamber hydraulic pipeline. Switch valves are provided on both the rod chamber hydraulic pipeline and the rodless chamber hydraulic pipeline.

[0026] The two rod-side chambers of the first floating outrigger cylinder 51 and the second floating outrigger cylinder 52 are connected by a rod-side hydraulic pipeline, and the two rodless chambers are connected by a rodless hydraulic pipeline. A switching valve is provided in the middle of each hydraulic pipeline. During driving, the switching valve is opened, and the hydraulic oil can flow freely between the two cylinders. The extension of one cylinder is the same as the retraction of the other cylinder, achieving equal volume leveling. The wheels on both sides installed on the first front floating outrigger 41 and the second front floating outrigger 42 can float according to the undulation of the road surface. The two floating outrigger cylinders achieve equal volume leveling, so that the wheels on both sides move up and down in opposite directions, realizing the self-balancing function of the axle following the undulation of the road surface on both sides.

[0027] Specifically, for example, when the wheel on one side of the first front floating outrigger 41 rises, it retracts through the first floating outrigger cylinder 51, while the second floating outrigger cylinder 52 extends. The hydraulic oil between the two cylinders can flow freely between them to achieve equal volume leveling. The wheel on the side of the second front floating outrigger 42 will then descend, achieving a seesaw-like effect. This enables the front floating outrigger to self-level as it follows the undulations of the road surface. Connecting the hydraulic lines of the two floating outrigger cylinders reduces the complexity and cost of the two separate outriggers' linkage control as they follow the road conditions, while improving reliability and response speed.

[0028] When the frame is in operation, the switch valve is closed, the floating outrigger cylinders are locked and cannot extend or retract, forming a rigid connection that restricts the floating of the two front floating outriggers, thereby providing stable "four-point support" for the whole machine with the four outriggers.

[0029] This invention relates to an X-type outrigger frame supporting floating control, employing two integrated swing outriggers and two separate swing outriggers. The separate swing outriggers consist of a rear swing outrigger and a front floating outrigger, connected by a pin. Each of the two separate swing outriggers is equipped with a floating outrigger cylinder, with the two ends of the cylinder connected to the rear swing outrigger and the front floating outrigger respectively via pins. Simply changing the two outriggers to a separate structure and adding two outrigger floating cylinders and switching valves, the floating cylinders on both sides are leveled by equal volume adjustment, causing the floating outriggers on both sides and the wheels to move up and down in opposite directions, realizing the axle's self-balancing function in response to road undulations. This does not change the overall frame dimensions, requires no complex components or control programs, and is stable, reliable, and low-cost.

[0030] Example 2

[0031] This embodiment provides a control method for an X-type outrigger frame, using the X-type outrigger frame of the aforementioned embodiment 1, including: during driving, the switch valve is opened, and both the first floating outrigger cylinder and the second floating outrigger cylinder are unlocked, so that they can be freely adjusted according to road conditions; during operation, the switch valve is closed, and both the first floating outrigger cylinder and the second floating outrigger cylinder are locked.

[0032] Example 3

[0033] This embodiment provides a mobile lifting work platform, which is equipped with the X-shaped outrigger frame of the aforementioned embodiment 1.

[0034] The present invention has been disclosed above with reference to preferred embodiments, but it is not intended to limit the present invention. All technical solutions obtained by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the present invention.

Claims

1. An X-shaped support frame, characterized in that, include: The frame structure (1), the integrated swing leg (2), and the split leg are provided. The integrated swing leg (2) is connected to one side of the frame structure (1) by a pin, and the split leg is connected to the other side of the frame structure (1) by a pin. The split leg includes a front floating leg and a rear swing leg. The front floating leg and the rear swing leg are hinged together at the bottom. A floating leg cylinder is provided between the front floating leg and the rear swing leg. One end of the floating leg cylinder is hinged to the front floating leg, and the other end is hinged to the rear swing leg.

2. The X-type support frame according to claim 1, characterized in that, The rear swing leg includes a first rear swing leg (31) and a second rear swing leg (32), and the front floating leg includes a first front floating leg (41) and a second front floating leg (42). The first rear swing leg (31) and the first front floating leg (41) are connected below by a first floating leg pin (61) and a first floating leg cylinder (51) is provided above the first floating leg pin (61). The second rear swing leg (32) and the second front floating leg (42) are connected below by a second floating leg pin (62) and a second floating leg cylinder (52) is provided above the second floating leg pin (62).

3. The X-type support frame according to claim 2, characterized in that, The first floating outrigger cylinder (51) includes a first rod chamber and a first rodless chamber, and the second floating outrigger cylinder (52) includes a second rod chamber and a second rodless chamber. The first rod chamber and the second rod chamber are connected through a rod chamber hydraulic pipeline, and the first rodless chamber and the second rodless chamber are connected through a rodless chamber hydraulic pipeline. Switch valves are provided on both the rod chamber hydraulic pipeline and the rodless chamber hydraulic pipeline.

4. The X-type support frame according to claim 3, characterized in that, A swing leg cylinder (81) is provided between the first rear swing leg (31) and the second rear swing leg (32).

5. The X-type support frame according to claim 3, characterized in that, An integrated swing leg cylinder (82) is provided between the integrated swing legs (2).

6. The X-type support frame according to claim 3, characterized in that, One end of the first floating support leg cylinder (51) is connected to the first front floating support leg (41) by a pin, and the other end is connected to the first rear swing support leg (31) by a pin; one end of the second floating support leg cylinder (52) is connected to the second front floating support leg (42) by a pin, and the other end is connected to the second rear swing support leg (32) by a pin.

7. A control method for an X-type outrigger frame, characterized in that, The X-type outrigger frame according to any one of claims 3 to 6 includes: During driving, the switch valve opens, and both the first floating outrigger cylinder (51) and the second floating outrigger cylinder (52) are unlocked so that they can be freely adjusted according to road conditions; During operation, the switch valve is closed, and both the first floating outrigger cylinder (51) and the second floating outrigger cylinder (52) are locked.

8. A mobile lifting work platform, characterized in that, The vehicle is equipped with an X-shaped outrigger frame as described in any one of claims 1 to 6.

Images